I have Zep Wet Look on my ol 95 Bounder. It doesn't yellow but it does start to flake off after about 3 years. During that time I don't have to wax, only wash it and the bugs come off the front easily. It takes me about 3 days to strip and reapply 3-4 coats. Soooooooo, I only spend 3 days every 3 years making the coach shine.
Your mileage may vary.
Richard